Which temperature heads should be used for light, ordinary, and extra hazards?

Using ordinary temperature heads is appropriate for light, ordinary, and extra hazard categories in fire sprinkler systems because these heads are designed to activate at a specific temperature range that is suitable for most standard applications. Ordinary temperature heads typically activate at temperatures ranging from 135°F to 170°F (57°C to 77°C), making them effective in controlling common fire scenarios found in these hazard classes.

Light hazard installations, which might include areas such as offices or storage spaces with minimal combustibles, rely on ordinary temperature heads because the expected fire conditions do not require an early response that high temperature heads would offer. Similarly, ordinary and extra hazard categories consist of environments with more significant combustible loads that could create more intense fires. However, these systems still generally fall within the activation threshold of ordinary heads, allowing them to respond effectively to developing fires without unnecessary activation due to minor heat sources.

Other head types like high, low, or cold temperature heads are inappropriate in typical settings for these hazard classifications due to their activation thresholds being either too high or too low for the intended applications. High temperature heads are meant for environments with consistently high ambient temperatures, low temperature heads are tailored for colder environments, and cold temperature heads are used specifically to prevent freezing in unconditioned spaces. Thus